Such a shame that more than 5 years of concept work went nowhere. But as you can see... some of them survived in another form. 😉
There's a game I won't name that I worked on as a concept founder/designer more than 10 years ago. I ran away from the team because I couldn't stand working with the "leader" who took my idea and turned it into his fancy "blockbuster fantasy" thing. And now it's just been released in Early Access.